• Journal of Life Science
• /
• v.18 no.8
• /
• pp.1072-1082
• /
• 2008

The purpose of this study was to report the difference of nutritional factors for high school female tennis players pre and during the competition. A total of 7 tennis players (4 elite and 3 non-elite) participated in this study. All participants reported the total food lists and amounts of ingestion prior to 3 days and during 3 days the competition. The total calorie of prior to the competition for elite group (2869.7${\pm}$426.6 kcal) was significantly higher than non-elite group (1743.4${\pm}$220.8 kcal). The amount of carbohydrate for elite group (pre: 242.2${\pm}$188.4 g, during: 241.6${\pm}$ 201.4 g) was statistically higher than non-elite group (pre: 173.9${\pm}$127.1 g, during: 206.8${\pm}$123.7 g) pre and during the competition. There were no different amount of protein and fat between two group before and during the competition. The amount of calcium and phosphorus were also no different among the groups The consumption of iron was different prior to the competition (15.95${\pm}$3.09 vs. 10.36${\pm}$2.40 mg). The elite group (1.76${\pm}$0.30 mg) consumed vitamin B1 more than non-elite group (1.21${\pm}$0.23 mg) during the competition. No different other vitamines between two groups pre and during the competition.

• Korean Journal of Cognitive Science
• /
• v.16 no.2
• /
• pp.141-154
• /
• 2005

The purpose of this study was to investigate the effects of implicit and explicit situation awareness instruction on decision making and event related brain potentials. Psychophysiological data obtained from 36 intermediated level tennis players whose National Tennis Rating Program(NTTP) belong 2 to 2.5 were compared. Participants were randomly assigned to one of three experimental groups: (1) implicit situation awareness, (2) explicit situation awareness, and (3) control group. A total of 90 clips were presented via a beam project screen, and participants pressed one of three jelly bean buttons to indicate the direction of ball hit. Dependent measures were the latencies and amplitudes of P300 on Pz, Cz, and Fz. The results of this study indicated that participants in the implicit situation awareness produced tenser P300, than participants in the explicit situation awareness group. The findings also indicated that single defense showed longer P300 latencies than single attack as well as double defense. The P300-amplitude of treatment groups were longer than control group. The Cz area showed shorer P300 latencies than Pz and Fz areas. In addition, single defense situation demonstrated longer P300 latencies than single attack and double defence situations. Based on this study, it is believed that implicit and explicit situation awareness instruction influence decision making in different ways.

• Korean Journal of Applied Biomechanics
• /
• v.19 no.2
• /
• pp.337-345
• /
• 2009

The purpose of this study were to find out the differences in kinematic variables of racket movement by performing the tennis serve. Three top male tennis players participated in this study. Three synchronized high-speed cameras were used to record the service action of top players for Three dimensional video analysis. The results of this study showed that (1) the velocity of the tennis racket at impact is important to the generation of racket velocity to Y-axis. This result indicates that forward motion and upward movement of the racket; (2) with respect to racket angular velocity at impact, the fast angular momentum of X-axis is important to generate the velocity of the tennis ball. This result indicate upward movement of the racket with a strong flexor of wrist joint; (3) the velocity of the tennis ball was influenced by the change of angular linking the Z-axis to -X-axis. This result indicates that the high velocity of the tennis ball is obtained from having the racket unitedly moving to the direction of the bill's flight at the acceleration interval and acquiring the distance of acceleration with the racket head vertically to the ground at the back scratching.

• 월간산업보건
• /
• s.185
• /
• pp.63-64
• /
• 2003

우리들의 몸은 연령과 함께 쇠약해져 갑니다. 특히 40대, 50대가 되면 자신이 생각하고 있는 이상으로 몸이 쇠약해 있습니다. 유감스럽게도 연령에 의한 체력 저하는 피할 수 없겠지만, 운동부족으로 인한 체력 저하는 적절한 운동으로 예방할 수가 있습니다. 그러나 날마다 운동을 하고 있지 않던 사람이 갑자기 운동을 하기 시작하면 생각지 않았던 부상이나 사고를 일으킬 우려가 있기 때문에 적절한 운동방식, 강도, 빈도, 실시시간에 주의해서 하는 것이 중요합니다. 본 원고에서는 운동을 통한 건강관리에 있어서 부상이나 질병으로 이어지지 않도록 하기 위한 유의점을 구체적인 스포츠를 예로 들면서 해설하였습니다.

• The Journal of Korean Institute for Practical Engineering Education
• /
• v.1 no.1
• /
• pp.91-98
• /
• 2009

In approach of human-robot interaction, it is importance task in future robot industry to make to robot recognize, express, coping the emotions. The purpose of this study was to examination the effects unconscious positive and negative emotion of information processing of motor program. 13 participants(male=11, female=2) viewed smile-face picture and angry-face picture priming at 10ms level, and then performanced button press, button press and one tennis ball hitting, and button press and two tennis ball hitting task. The results appeared that positive emotion triggered more fast RT than negative emotion in planning complex motor program. Possible explanations for the performance differences depended on emotion are discussed and future research directions were provided.

• Journal of Arbitration Studies
• /
• v.28 no.1
• /
• pp.77-97
• /
• 2018

The Court of Arbitration for Sport (CAS) has been adjudicating on sports-related disputes since 1984. CAS can be regarded as world supreme court for sports settling down about 4200 cases including doping issues. Doping disputes are generally processed by CAS Appeals division and Anti-Doping Division. An appeal against the decision by sports-related bodies may be filed with CAS Appeals Division. Doping issues concerning Olympic games are on Anti-Doping Division, introduced from 2016 Olympic games and invested with complete authority by IOC. The Award of Maria Sharapova finds a player is responsible if found to have committed any Anti-Doping Rule Violation regardless of his/her intention or fault. It offers detailed jurisprudence on imposing such a specific period of ineligibility in view of the totality of the circumstances. The award of Xinyi Chen also confirms the Strict Liability Rule on anti-doping disputes. The player appealed there could be either accidental contamination of drinks, or doping laboratories' mistakes that affected the test results. But, all of them were rejected. Though dealing with doping disputes in a timely manner is important for seasonal sports events like Olympic games, it is necessary to prepare the acceptable and fair process for the players in the future.

• Journal of Digital Convergence
• /
• v.16 no.3
• /
• pp.543-552
• /
• 2018

The purpose of this study is to provide basic data for the improvement of the tournament operating environment and effective tournament operation. For the factor analysis, exploratory factor analysis was conducted. Based on this, in order to conduct hierarchical analysis, we've produced and distributed the questionnaire to expert group. And after, with collected data, AHP (Analytical Hierarchy Process) technique was used to analyze relative importance and determinants. As a result, operational factors showed the highest priority among the components of evaluation. And next prior factors are satisfaction of participants, environmental factors and etc. In order to stabilize the operation of the tournament, priority shall be securing the budget. And it is necessary to understand the desire of participants and shall consider characteristics and level of the tournament. In future studies, it will be necessary to make a comparative study through expert group in order to secure the fitness.

• Journal of The Korean Society of Integrative Medicine
• /
• v.3 no.2
• /
• pp.1-8
• /
• 2015

Purpose: This study was conducted to know the evidence case to assessment about literatures of extensor carpi radialis therapeutic strategy of tennis elbow about dysfunction wrist extension with anatomy, biomechanic and function. Method: Patient was received the physical therapy program with medication for two weeks. Physical therapy program consists of strengthening exercise, stretching exercise and extracopereal shock wave therapy. Results: Patients could do computer and house works at three weeks significant with improved pain. The amounts used repetitive muscle was reduced slowly over a period of a day or two days for wrist moving. Wrist flexor strengthening exercise and could reduced the wrist extensor injury. Conclusion: Clinicians certainly realized biomechanic effects and anatomy of extensor carpiradialis and elbow joint.

• Proceedings of the Korean Statistical Society Conference
• /
• 2002.11a
• /
• pp.51-59
• /
• 2002

스포츠 통계와 관련된 주제들은 경기결과의 설명 예측력 분석, 선수와 팀 평가, 경기내용의 요약, 경기의 환경적 요인 평가, 경기 규칙 분석, 경기결과의 시각적 표현, 토너먼트 구조 연구 등의 영역으로 다양하다. 이 글에서는 야구 축구 농구 테니스 종목을 중심으로 통계적 방법을 적용하여 스포츠 현장의 문제를 어떻게 접근하고 있는지를 개괄하였다. 전통적으로 스포츠 통계는 선수와 팀 그리고 전략의 평가가 주를 이루었지만, 오늘날 스포츠통계는 경기의 잠재적, 외적 요인 등의 주제로 관심영역을 넓혀가고 있다. 그러나 국내에서는 경기내용의 기술적(descriptive) 분석이 주류를 이루고 있으며, 전문적 수준의 통계적 접근은 활발하지 못하고 있다. 현장과 자료의 특성을 고려하여 통계와 스포츠(체육)분야의 다양한 협동연구가 필요하다.

• The Korean Journal of Applied Statistics
• /
• v.22 no.6
• /
• pp.1331-1343
• /
• 2009

In this paper, we are interested in tennis games and the best of all matches that is fair to most of all participants. Especially when players are ordered in accordance with their playing ability, we are interested in finding the best of all matches that is even with each other's playing pair. We propose a loss function And using our proposed loss function, we get a best match that obtains the minimal loss according to the number of games for given participants.